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Titolo:
SPINAL-CORD LAMINA-V AND LAMINA-VII INTERNEURONAL PROJECTIONS TO SYMPATHETIC PREGANGLIONIC NEURONS
Autore:
CABOT JB; ALESSI V; CARROLL J; LIGORIO M;
Indirizzi:
SUNY STONY BROOK,DEPT NEUROBIOL & BEHAV,LIFE SCI BLDG STONY BROOK NY 11794
Titolo Testata:
Journal of comparative neurology
fascicolo: 4, volume: 347, anno: 1994,
pagine: 515 - 530
SICI:
0021-9967(1994)347:4<515:SLALIP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
WHEAT-GERM-AGGLUTININ; CONJUGATED HORSERADISH-PEROXIDASE; PSEUDORABIES VIRUS; AFFERENT-FIBERS; WGA-HRP; TRANSNEURONAL TRANSPORT; SYNAPTIC INPUT; NERVOUS-SYSTEM; NEONATAL RAT; SPINODELTOIDEUS MOTONEURONS;
Keywords:
AUTONOMIC NERVOUS SYSTEM; INTERMEDIOLATERAL CELL COLUMN; INTERNEURONS; SYMPATHETIC NERVOUS SYSTEM; TRANSNEURONAL TRANSPORT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
96
Recensione:
Indirizzi per estratti:
Citazione:
J.B. Cabot et al., "SPINAL-CORD LAMINA-V AND LAMINA-VII INTERNEURONAL PROJECTIONS TO SYMPATHETIC PREGANGLIONIC NEURONS", Journal of comparative neurology, 347(4), 1994, pp. 515-530

Abstract

This light and electron microscopic study sought to localize spinal cord interneurons that contribute to the normal and abnormal physiological regulation of spinal sympathetic preganglionic function. Sympathetic preganglionic neurons in caudal C8 through T4 of rat spinal cord were retrogradely labeled with wheat germ agglutinin (WGA) and/or cholera beta subunit (CT beta) following injections into the superior cervical ganglion (SCG). With two exceptions, the observed locations of retrogradely WGA- and CT beta-labeled sympathetic preganglionic neurons were as expected from previous studies. The exceptions were restricted populations of cells in caudal C8 and rostral T1 spinal segments. Theseneurons were classified as ventrolateral (vlSPN) and ventromedial (vmSPN) sympathetic preganglionic neurons; their somata and dendrites encircled dorsolateral lamina M motoneurons. Only WGA was transported transneuronally following the retrograde labeling of sympathetic preganglionic neurons. Transneuronally WGA-labeled spinal interneurons were located principally in the reticulated division of lamina V and dorsolateral lamina VII. A strict segmental organization was observed. All transneuronally labeled interneurons were ipsilateral to, and coextensivewith, retrogradely WGA-labeled sympathetic preganglionic neurons. Electron microscopic observations suggested that retrograde transsynapticpassage of WGA occurred within the sympathetic preganglionic neuropiland showed further that similar classes of organelles were WGA immunoreactive in retrogradely labeled sympathetic preganglionic neurons andin transneuronally labeled lamina V and lamina VII neurons: 1) cisternae and vesicles at the trans face of the Golgi apparatus, 2) large endosomes/dense bodies, and 3) multivesicular bodies. The data are consistent with two hypotheses: 1) Somatic and visceral primary afferent inputs to thoracic spinal cord modify segmental sympathetic preganglionic function through activation of a disynaptic pathway involving laminaV and/or lamina VII interneurons, and 2) long-loop propriospinal pathways access sympathetic preganglionic neurons through symmetrical, segmental interneuronal circuitry. (C) 1994 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 10:18:06